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CFG: Refactored how the config file works. 

It is now kept in memory as per 3dbrew, all updates happen on memory, then they can be saved using UpdateConfigNANDSavegame.
master
Subv 2014-12-19 15:30:25 +07:00
parent 462740278d
commit 4cd21b43c1
2 changed files with 130 additions and 59 deletions
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2
src/core/file_sys/archive_systemsavedata.cpp
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@ -18,7 +18,7 @@ namespace FileSys {
Archive_SystemSaveData::Archive_SystemSaveData(const std::string& mount_point, u64 save_id)
: DiskArchive(Common::StringFromFormat("%s%08X/%08X/", mount_point.c_str(),
static_cast<u32>(save_id & 0xFFFFFFFF), static_cast<u32>((save_id >> 31) & 0xFFFFFFFF))) {
static_cast<u32>(save_id & 0xFFFFFFFF), static_cast<u32>((save_id >> 32) & 0xFFFFFFFF))) {
LOG_INFO(Service_FS, "Directory %s set as SystemSaveData.", this->mount_point.c_str());
}

189
src/core/hle/service/cfg_u.cpp
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@ -13,17 +13,6 @@
namespace CFG_U {
static std::unique_ptr<FileSys::Archive_SystemSaveData> cfg_system_save_data;
static const u64 CFG_SAVE_ID = 0x00010017;
static const u64 CONSOLE_UNIQUE_ID = 0xDEADC0DE;
/// TODO(Subv): Find out what this actually is
/// Thanks Normmatt for providing this information
static const u8 STEREO_CAMERA_SETTINGS[32] = {
0x00, 0x00, 0x78, 0x42, 0x00, 0x80, 0x90, 0x43, 0x9A, 0x99, 0x99, 0x42, 0xEC, 0x51, 0x38, 0x42,
0x00, 0x00, 0x20, 0x41, 0x00, 0x00, 0xA0, 0x40, 0xEC, 0x51, 0x5E, 0x42, 0x5C, 0x8F, 0xAC, 0x41
};
enum SystemModel {
NINTENDO_3DS,
NINTENDO_3DS_XL,
@ -32,6 +21,20 @@ enum SystemModel {
NEW_NINTENDO_3DS_XL
};
static std::unique_ptr<FileSys::Archive_SystemSaveData> cfg_system_save_data;
static const u64 CFG_SAVE_ID = 0x00010017;
static const u64 CONSOLE_UNIQUE_ID = 0xDEADC0DE;
static const u32 CONSOLE_MODEL = NINTENDO_3DS_XL;
static const u32 CONFIG_SAVEFILE_SIZE = 0x8000;
static std::array<u8, CONFIG_SAVEFILE_SIZE> cfg_config_file_buffer = { };
/// TODO(Subv): Find out what this actually is
/// Thanks Normmatt for providing this information
static const u8 STEREO_CAMERA_SETTINGS[32] = {
0x00, 0x00, 0x78, 0x42, 0x00, 0x80, 0x90, 0x43, 0x9A, 0x99, 0x99, 0x42, 0xEC, 0x51, 0x38, 0x42,
0x00, 0x00, 0x20, 0x41, 0x00, 0x00, 0xA0, 0x40, 0xEC, 0x51, 0x5E, 0x42, 0x5C, 0x8F, 0xAC, 0x41
};
// TODO(Link Mauve): use a constexpr once MSVC starts supporting it.
#define C(code) ((code)[0] | ((code)[1] << 8))
@ -134,9 +137,11 @@ struct SaveFileConfig {
u16 total_entries;
u16 data_entries_offset;
SaveConfigBlockEntry block_entries[1479];
u32 unknown;
};
/* Reads a block with the specified id and flag from the Config savegame file
/**
* Reads a block with the specified id and flag from the Config savegame buffer
* and writes the output to output.
* The input size must match exactly the size of the requested block
* TODO(Subv): This should actually be in some file common to the CFG process
@ -147,41 +152,128 @@ struct SaveFileConfig {
* @returns ResultCode indicating the result of the operation, 0 on success
*/
ResultCode GetConfigInfoBlock(u32 block_id, u32 size, u32 flag, u8* output) {
FileSys::Mode mode;
mode.hex = 0;
mode.read_flag = 1;
FileSys::Path path("config");
auto file = cfg_system_save_data->OpenFile(path, mode);
_dbg_assert_msg_(Service_CFG, file != nullptr, "Could not open the CFG service config file");
SaveFileConfig config;
size_t read = file->Read(0, sizeof(SaveFileConfig), reinterpret_cast<u8*>(&config));
// Read the header
SaveFileConfig* config = reinterpret_cast<SaveFileConfig*>(cfg_config_file_buffer.data());
if (read != sizeof(SaveFileConfig)) {
LOG_CRITICAL(Service_CFG, "The config savefile is corrupted");
return ResultCode(-1); // TODO(Subv): Find the correct error code
}
auto itr = std::find_if(std::begin(config.block_entries), std::end(config.block_entries),
auto itr = std::find_if(std::begin(config->block_entries), std::end(config->block_entries),
[&](SaveConfigBlockEntry const& entry) {
return entry.block_id == block_id && entry.size == size && (entry.flags & flag);
});
if (itr == std::end(config.block_entries)) {
LOG_TRACE(Service_CFG, "Config block %u with size %u and flags %u not found", block_id, size, flag);
if (itr == std::end(config->block_entries)) {
LOG_ERROR(Service_CFG, "Config block %u with size %u and flags %u not found", block_id, size, flag);
return ResultCode(-1); // TODO(Subv): Find the correct error code
}
// The data is located in the block header itself if the size is less than 4 bytes
if (itr->size <= 4) {
if (itr->size <= 4)
memcpy(output, &itr->offset_or_data, itr->size);
} else {
size_t data_read = file->Read(itr->offset_or_data, itr->size, output);
if (data_read != itr->size) {
LOG_CRITICAL(Service_CFG, "The config savefile is corrupted");
return ResultCode(-1); // TODO(Subv): Find the correct error code
}
else
memcpy(output, &cfg_config_file_buffer[config->data_entries_offset + itr->offset_or_data], itr->size);
return RESULT_SUCCESS;
}
/**
* Creates a block with the specified id and writes the input data to the cfg savegame buffer in memory.
* The config savegame file in the filesystem is not updated.
* TODO(Subv): This should actually be in some file common to the CFG process
* @param block_id The id of the block we want to create
* @param size The size of the block we want to create
* @param flag The flags of the new block
* @param data A pointer containing the data we will write to the new block
* @returns ResultCode indicating the result of the operation, 0 on success
*/
ResultCode CreateConfigInfoBlk(u32 block_id, u32 size, u32 flags, u8 const* data) {
SaveFileConfig* config = reinterpret_cast<SaveFileConfig*>(cfg_config_file_buffer.data());
// Insert the block header with offset 0 for now
config->block_entries[config->total_entries] = { block_id, 0, size, flags };
if (size > 4) {
s32 total_entries = config->total_entries - 1;
u32 offset = 0;
// Perform a search to locate the next offset for the new data
while (total_entries >= 0) {
// Ignore the blocks that don't have a separate data offset
if (config->block_entries[total_entries].size <= 4) {
--total_entries;
continue;
}
offset = config->block_entries[total_entries].offset_or_data +
config->block_entries[total_entries].size;
break;
}
config->block_entries[config->total_entries].offset_or_data = offset;
// Write the data at the new offset
memcpy(&cfg_config_file_buffer[config->data_entries_offset + offset], data, size);
} else {
// The offset_or_data field in the header contains the data itself if it's 4 bytes or less
memcpy(&config->block_entries[config->total_entries].offset_or_data, data, size);
}
++config->total_entries;
return RESULT_SUCCESS;
}
/**
* Deletes the config savegame file from the filesystem, the buffer in memory is not affected
* TODO(Subv): This should actually be in some file common to the CFG process
* @returns ResultCode indicating the result of the operation, 0 on success
*/
ResultCode DeleteConfigNANDSaveFile() {
FileSys::Path path("config");
if (cfg_system_save_data->DeleteFile(path))
return RESULT_SUCCESS;
return ResultCode(-1); // TODO(Subv): Find the right error code
}
/**
* Writes the config savegame memory buffer to the config savegame file in the filesystem
* TODO(Subv): This should actually be in some file common to the CFG process
* @returns ResultCode indicating the result of the operation, 0 on success
*/
ResultCode UpdateConfigNANDSavegame() {
FileSys::Mode mode;
mode.hex = 0;
mode.write_flag = 1;
mode.create_flag = 1;
FileSys::Path path("config");
auto file = cfg_system_save_data->OpenFile(path, mode);
_dbg_assert_msg_(Service_CFG, file != nullptr, "could not open file");
file->Write(0, CONFIG_SAVEFILE_SIZE, 1, cfg_config_file_buffer.data());
return RESULT_SUCCESS;
}
/**
* Re-creates the config savegame file in memory and the filesystem with the default blocks
* TODO(Subv): This should actually be in some file common to the CFG process
* @returns ResultCode indicating the result of the operation, 0 on success
*/
ResultCode FormatConfig() {
ResultCode res = DeleteConfigNANDSaveFile();
if (!res.IsSuccess())
return res;
// Delete the old data
std::fill(cfg_config_file_buffer.begin(), cfg_config_file_buffer.end(), 0);
// Create the header
SaveFileConfig* config = reinterpret_cast<SaveFileConfig*>(cfg_config_file_buffer.data());
config->data_entries_offset = 0x455C;
// Insert the default blocks
res = CreateConfigInfoBlk(0x00050005, 0x20, 0xE, STEREO_CAMERA_SETTINGS);
if (!res.IsSuccess())
return res;
res = CreateConfigInfoBlk(0x00090001, 0x8, 0xE, reinterpret_cast<u8 const*>(&CONSOLE_UNIQUE_ID));
if (!res.IsSuccess())
return res;
res = CreateConfigInfoBlk(0x000F0004, 0x4, 0x8, reinterpret_cast<u8 const*>(&CONSOLE_MODEL));
if (!res.IsSuccess())
return res;
// Save the buffer to the file
res = UpdateConfigNANDSavegame();
if (!res.IsSuccess())
return res;
return RESULT_SUCCESS;
}
@ -271,6 +363,8 @@ Interface::Interface() {
return;
}
// TODO(Subv): All this code should be moved to cfg:i,
// it's only here because we do not currently emulate the lower level code that uses that service
// Try to open the file in read-only mode to check its existence
FileSys::Mode mode;
mode.hex = 0;
@ -282,30 +376,7 @@ Interface::Interface() {
if (file != nullptr)
return;
mode.create_flag = 1;
mode.write_flag = 1;
mode.read_flag = 0;
// Re-open the file in write-create mode
file = cfg_system_save_data->OpenFile(path, mode);
// Setup the default config file data header
SaveFileConfig config = { 3, 0, {} };
u32 offset = sizeof(SaveFileConfig);
// Console-unique ID
config.block_entries[0] = { 0x00090001, offset, 0x8, 0xE };
offset += 0x8;
// Stereo Camera Settings?
config.block_entries[1] = { 0x00050005, offset, 0x20, 0xE };
offset += 0x20;
// System Model (Nintendo 3DS XL)
config.block_entries[2] = { 0x000F0004, NINTENDO_3DS_XL, 0x4, 0x8 };
// Write the config file data header to the config file
file->Write(0, sizeof(SaveFileConfig), 1, reinterpret_cast<u8*>(&config));
// Write the data itself
file->Write(config.block_entries[0].offset_or_data, 0x8, 1,
reinterpret_cast<u8 const*>(&CONSOLE_UNIQUE_ID));
file->Write(config.block_entries[1].offset_or_data, 0x20, 1, STEREO_CAMERA_SETTINGS);
FormatConfig();
}
Interface::~Interface() {